Apparatus for adaptively setting resolution and apparatus for providing video data

The invention relates to an apparatus for adaptively setting resolution and an apparatus for providing video data. Disclosed are a method for adaptively setting resolution and a video decoding device. According to one embodiment of the present invention, a method for adaptively setting resolution in units of pictures comprises the steps of: decoding maximum resolution information from a bitstream; decoding resolution information on the current picture from the bitstream; and setting the resolution of the current picture based on the maximum resolution information or the resolution information, the size of the resolution information being less than or equal to the size of the maximum resolution information. 本申请涉及自适应地设置分辨率的设备和提供视频数据的设备。公开了一种自适应地设置分辨率的方法和视频解码装置。根据本发明的一个实施方式，以图片为单位自适应地设置分辨率的方法包括以下步骤：从比特流解码最大分辨率信息；从比特流解码关于当前图片的分辨率信息；以及基于最大分辨率信息或分辨率信息设置当前图片的分辨率，其中，分辨率信息的大小小于或等于最大分辨率信息的大小。